Investigation into the Corrosion-Resistant Properties of Psidium guajava Leaf Extract on Mild Steel in Simulated Conditions

Authors

  • Aisha Siddekha

    Department of Chemistry, Government First Grade College, Tumkur 572102, India
  • Asokan Vasudevan

    Faculty of Business and Communications, INTI International University, Nilai 71800, Malaysia

    Business Administration and Management, Wekerle Business School, 1083 Budapest, Hungary
  • Lalithamba Haraluru Shankaraiah

    Department of Chemistry, Siddaganga Institute of Technology, Tumkur 572103, India
  • Yogeesh Nijalingappa

    Department of Mathematics, Government First Grade College, Tumkur 572101, India
  • Suleiman Ibrahim Mohammad

    Faculty of Business and Communications, INTI International University, Nilai 71800, Malaysia

    Department of Business Administration, Business School, Al al-Bayt University, Mafraq 25113, Jordan

DOI:

https://doi.org/10.30564/jbms.v8i3.12734
Received: 11 November 2025 | Revised: 12 December 2025 | Accepted: 3 March 2026 | Published Online: 17 July 2026

Abstract

Plant-extract inhibitors are attractive for mitigating marine and oil-and-gas corrosion while reducing toxicity and environmental persistence. Here, an aqueous Psidium guajava (guava) leaf extract was evaluated as a green inhibitor for mild steel in 5% NaCl at room temperature for 24 h, under both (i) conditions without H₂S and (ii) H₂S-souring simulated by in situ Na₂S/acetic acid. Inhibition performance was pre-screened by the weight-loss method and interpreted using adsorption-isotherm fitting and Hill-type dose-response analysis to estimate apparent adsorption/thermodynamic parameters and characteristic concentrations. To assess environmental compatibility, bioaccumulation potential (log P{o/w}), seawater biodegradation (OECD 306 BOD/COD), and a brine-shrimp toxicity screen were also assessed. The extract produced concentration-dependent inhibition with different optimum ranges depending on H₂S presence and exhibited low bioaccumulation potential and substantial biodegradation in the screening tests. Although electrochemical and surface-analytical validation is required, the combined corrosion-performance plus environmental-screening workflow suggests Psidium guajava leaf extract as a promising candidate for further development of sustainable corrosion inhibitors.

Keywords:

Psidium guajava; Mild Steel; Green Corrosion Inhibitor; Weight Loss; Adsorption Isotherm; Dose-Response; H₂S; Bioaccumulation; Biodegradation; Toxicity Screening

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How to Cite

Siddekha, A., Vasudevan, A., Shankaraiah, L. H., Nijalingappa, Y., & Mohammad, S. I. (2026). Investigation into the Corrosion-Resistant Properties of Psidium guajava Leaf Extract on Mild Steel in Simulated Conditions. Journal of Building Material Science, 8(3), 24–36. https://doi.org/10.30564/jbms.v8i3.12734

Issue

Vol. 8, Iss. 3 (September 2026): In Progress

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Article

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Copyright © 2026 Aisha Siddekha, Asokan Vasudevan, Lalithamba Haraluru Shankaraiah, Yogeesh Nijalingappa, Suleiman Ibrahim Mohammad

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This is an open access article under the Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) License.

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